For more than 20 years, Errol L. Montgomery & Associates has set the standard by which technical and professional excellence is measured in the field of hydrogeologic consulting. With offices in Arizona and Chile, we specialize in all aspects of investigating, analyzing, managing, and sustaining groundwater resources. We offer a wide range of services to clients in both the public and private sectors. Learn more...

Now M&A has the ability to help clients integrate a wider range of water sources into their supply portfolio and address waste challenges by providing targeted treatment solutions. Our new division is led by Andrew MacHugh and Joel Peterson. Learn more...

M&A recognized a growing need to address not only the hydrogeologic constraints on water development but also those imposed by policy and economics. Mark Myers and Juliet McKenna and their team help clients navigate issues that impact long-term investments in water infrastructure. Learn more...